What is the purpose of Empty Coalesce Field in Transform map?

[Community Alums]

Can someone please help me in understanding the use of this field. Where and why will this field will be used?

[ArunavaS]

you check coalesce empty, then for target empty field it will update the record in source table instead of creating a new record. Though it is not used very frequently. 

[Community Alums]

When the Coalesce field is empty - Every incoming record is treated as a new record. No attempt is made to match and update existing records.